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QBO Modulation of the MJO-Related Precipitation in East Asia

Title
QBO Modulation of the MJO-Related Precipitation in East Asia
Authors
Kim, HeraSon, Seok-WooYoo, Changhyun
Ewha Authors
유창현
SCOPUS Author ID
유창현scopus
Issue Date
2020
Journal Title
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN
2169-897XJCR Link

2169-8996JCR Link
Citation
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES vol. 125, no. 4
Publisher
AMER GEOPHYSICAL UNION
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
This study revisits precipitation change in East Asia caused by the Madden-Julian oscillation (MJO) and its interannual variation due to the quasi-biennial oscillation (QBO). Specifically, boreal-winter precipitation, derived from weather stations across China, Korea, and Japan, is examined for MJO phases 2-3 and 6-8. Consistent with previous findings, precipitation in southern China and southern Japan increases by up to 36% during MJO phases 2-3, when the MJO convection is located in the Indian Ocean. In contrast, during MJO phases 6-8, precipitation decreases by 13%. More importantly, these MJO-related precipitation anomalies become larger and more organized when the QBO is in its easterly phase. The difference in precipitation anomalies between the QBO easterly and westerly phases is approximately 40% for MJO phases 2-3 and 70% for MJO phases 6-8 from southern China to Japan. This result reaffirms that the QBO can affect surface weather in the northern extratropics through MJO teleconnection.
DOI
10.1029/2019JD031929
Appears in Collections:
엘텍공과대학 > 기후·에너지시스템공학전공 > Journal papers
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